Fix doctest with Cabal-2.0 by requiring c-i>=1.24

test/doctests.hs

@@ -1,23 +1,12 @@
-{-# LANGUAGE CPP #-}
 module Main where
 
-import Test.DocTest
-import System.Environment
-import Data.Maybe
+import Build_doctests (flags, pkgs, module_sources)
+import Data.Foldable (traverse_)
+import Test.DocTest (doctest)
 
 main :: IO ()
 main = do
-  distdir <- (fromMaybe "dist" . lookup "DOCTEST_DIST_DIR") `fmap` getEnvironment
-  doctest
-     [ "-package", "ghc-" ++ VERSION_ghc
-     , "-package", "transformers-" ++ VERSION_transformers
-     , "-package", "mtl-" ++ VERSION_mtl
-     , "-package", "directory-" ++ VERSION_directory
-     , "-XScopedTypeVariables", "-XRecordWildCards", "-XNamedFieldPuns", "-XConstraintKinds", "-XFlexibleContexts", "-XDataKinds", "-XKindSignatures", "-XTypeOperators", "-XViewPatterns"
-     , "-i" ++ distdir ++ "/build/autogen/"
-     , "-icore/"
-     , "-ishared"
---     , "-optP-include"
---     , "-optP" ++ distdir ++ "/build/autogen/cabal_macros.h"
-     , "GhcMod.hs"
-     ]
+    traverse_ putStrLn args -- optionally print arguments
+    doctest args
+  where
+    args = flags ++ pkgs ++ module_sources